Did same thing when I got it be for I took carbs off carbs are very clean inside.
SOURCE: 2005 yamaha yzf 250-unstable idle
I had the same problem, Turns out that my shims were finished, replace the chims and check clearences.
SOURCE: I have a 1981 Honda CT110 Trail 2 wheel
The problem is an air leak leaning the fuel mix. The idle speed starts going up a ramp until it is wide open. The valves no longer seating well is a possible cause as is carb manifold gaskets, rings and a cylinder head not torqued down tight.
SOURCE: 400 Eiger ATV, starts and runs fine, stalls the
If 2 stroke check crank seals, check plug cap for proper resistance,check for good fuel flow to carb.Spark should jump at least a 1/4" gap,NOT JUST the .030 or plug gap.
SOURCE: 33cc 14 inch homelite chainsaw, wont rev up to
Morning William:
Acceleration is the "L" needle, try 1/8 turn CCW. No better 3/16 CW.
Please install a new filter on the fuel line, you will be beat to death with carburetor overhauls if you do not.
Carburetor Adjustment by Madsens.com
http://www.madsens1.com/saw%20carb%20tune.htm
If you have more questions or need additional help please reply below and I will get back to you. Thank you for using FixYa and Good Luck. HTH
Lou
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